Non-Linear Analysis of a Two Post Roll-Over Protective Structure for Motor Grader

Abstract

Roll over protective structure (ROPS) is a critical passive safety system of any off-highway equipment. The ROPS is one of the mandatory DGMS requirements and structure is expected to withstand the impact force and maintains the safe space for operator survival during rollover accident. In the present research work, attempts are made to study the non-linear behavior of a two-post roll over protective structure of motor grader having 25T Gross Vehicle Weight (GVW) by using Finite Element Analysis (FEA). In order to enhance the energy absorbing capacity and to have better performance of ROP structure, an interweave energy absorber was introduced inside the ROPS column. CAD model of ROPS was made by using Pro-E modeling software and non-liner analysis was carried by using LS-Dyna software. Non-linear analysis used to compute the maximum deformation and von-misses stress and energy absorption with respect to the lateral, vertical and longitudinal load. Non-linear analysis was carried out for each load case and studied the behavior of ROPS structure. Among all the load conditions, the lateral impact load is a vital role with respect to the energy absorption criteria. The result of non-linear analysis is appreciably par with the standard ISO: 3471(2008) E ROPS performance.